WO2023188164A1

WO2023188164A1 - Elevator system

Info

Publication number: WO2023188164A1
Application number: PCT/JP2022/016173
Authority: WO
Inventors: 祐一梶山; 和則鷲尾; 英二横山
Original assignee: 三菱電機株式会社
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-10-05

Abstract

This elevator system comprises, for example, a tape (8), a sensor (11), a correction plate (12), a sensor (13), an operation control unit (25), a setting unit (23), and a calculation unit (24). The setting unit (23) sets a reference correction amount for a reference position code on the basis of the result of detection of the correction plate (12) by the sensor (13) when a car (1) stops at the reference floor under the control of the operation control unit (25). The calculation unit (24) calculates a correction amount for each position code attached to the tape (8), on the basis of the reference correction amount set by the setting unit (23). The operation control unit (25) controls movement of the car (1) on the basis of the position code read by the sensor (11) and the correction amount calculated by the calculation unit (24).

Description

elevator system

The present disclosure relates to an elevator system.

An elevator device is described in Patent Document 1. The elevator device described in Patent Document 1 includes a first tape for detecting the position of a car. The first tape is placed above and below the hoistway. The car is provided with a reading device for reading the positional information attached to the first tape.

The elevator device described in Patent Document 1 further includes a second tape for detecting the stop position of the car. The second tape is placed in accordance with the stop position on each floor. The stop position information attached to the second tape is read by the reading device.

Japanese Patent Application Publication No. 2021-66567

In the elevator device described in Patent Document 1, the position of the car is corrected based on the stop position information of the second tape. However, in this elevator system, in order to correct the position of the car, a second tape must be installed in accordance with the stop position of each floor. Therefore, there was a problem that the configuration became complicated.

The present disclosure has been made to solve the problems described above. An object of the present disclosure is to provide an elevator system that can correct the position of a car with a simple configuration.

The elevator system according to the present disclosure is an elevator system in which a car moves along a hoistway, the car stops at a plurality of stop floors, and some of the plurality of stop floors are set as reference floors. This system consists of a tape that is installed in the hoistway and has a position code attached to it over a specific range in which the car can move, and a first sensor that is installed on the car and reads the position code attached to the tape. a detection object provided in the hoistway in accordance with the position of the reference floor; a second sensor provided in the car for detecting the detection object; an operation control section for controlling movement of the car; a setting section that sets a reference correction amount for the reference position code based on a result of a second sensor detecting an object when the car stops at a reference floor under control of the control section; and a reference set by the setting section. A first calculation unit that calculates a correction amount for each position code attached to the tape based on the correction amount. The operation control section controls movement of the car based on the position code read by the first sensor and the correction amount calculated by the first calculation section. The reference position code is a code set in advance as a code indicating the position of the reference floor among the position codes attached to the tape.

With the elevator system according to the present disclosure, the position of the car can be corrected with a simple configuration.

1 is a diagram showing an example of an elevator system in Embodiment 1. FIG. FIG. 3 is a diagram for explaining the functions of a correction plate and a sensor. It is a figure for explaining the function of a control device. 3 is a flowchart showing an example of the operation of the elevator system in Embodiment 1. FIG. FIG. 3 is a diagram showing a state in which the car has stopped at a reference floor. FIG. 7 is a diagram showing another state in which the car has stopped at a reference floor. FIG. 7 is a diagram showing another state in which the car has stopped at a reference floor. FIG. 3 is a diagram for explaining heat transfer in a hoistway. It is a figure for explaining temperature distribution of a hoistway. It is a figure for explaining the amount of expansion and contraction of a tape. FIG. 3 is a diagram for explaining an example of a correction function. FIG. 12 is a diagram showing the difference between the curve shown in FIG. 11 and a straight line representing a correction function. FIG. 7 is a diagram for explaining another example of a correction function. 14 is a diagram showing the difference between the curve shown in FIG. 13 and a straight line showing a correction function. FIG. It is a figure showing the temperature distribution of the hoistway measured in an actual elevator system. 16 is a diagram showing the amount of expansion and contraction of the tape calculated from the temperature distribution shown in FIG. 15. FIG. FIG. 3 is a diagram for explaining an example of a correction function. FIG. 3 is a diagram illustrating an example of a correction error. FIG. 3 is a diagram showing a relationship between a detection position by a sensor and a maximum absolute value of a correction error. 14 is a diagram corresponding to FIG. 13. 15 is a diagram corresponding to FIG. 14. FIG. 3 is a diagram showing a relationship between a detection position by a sensor and a maximum absolute value of a correction error. FIG. 3 is a diagram showing a relationship between a detection position by a sensor and a maximum absolute value of a correction error. 14 is a diagram corresponding to FIG. 13. 15 is a diagram corresponding to FIG. 14. It is a figure which shows the ratio of the correction error in each building. It is a figure which shows the calculation example of the correction amount when three reference floors are set. FIG. 3 is a diagram for explaining a method of calculating delay time. FIG. 3 is a diagram illustrating an example of hardware resources of a control device. FIG. 7 is a diagram showing another example of hardware resources of the control device.

A detailed explanation will be given below with reference to the drawings. Duplicate explanations will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
FIG. 1 is a diagram showing an example of an elevator system in the first embodiment. The elevator system shown in FIG. 1 includes a car 1 and a counterweight 2. The car 1 moves up and down the hoistway 3. A car 1 and a counterweight 2 are suspended in a hoistway 3 by a rope 4. The counterweight 2 moves up and down the hoistway 3 in a direction opposite to the direction in which the car 1 moves. FIG. 1 shows an example of a 1:1 roping type elevator system.

The rope 4 is wound around the hoist 5. The hoist 5 drives the car 1. The control device 6 controls the hoisting machine 5. That is, the movement of the car 1 is controlled by the control device 6. FIG. 1 shows an example in which a hoist 5 and a control device 6 are provided in a machine room 7 above a hoistway 3. The hoist 5 and the control device 6 may be provided in the hoistway 3. The hoist 5 may be provided at the top of the hoistway 3 or may be provided in a pit of the hoistway 3.

A tape 8 is provided on the hoistway 3. The tape 8 is an elongated band-shaped member. It is preferable that the tape 8 is arranged in a straight line across the top and bottom of the hoistway 3. For example, the upper end of the tape 8 is fixed to a support member 9 provided at the top of the hoistway 3. A lower end portion of the tape 8 is supported by a support device 10 provided in a pit of the hoistway 3. A downward force is applied to the tape 8 by a spring, a weight, or the like provided in the support device 10.

A position code is attached to the tape 8 over a specific range in which the car 1 can move. It is preferable that the position code be attached to the entire range in which the car 1 can move. The position code may be a magnetic code or an optical code. Other types of codes may be recorded on the tape 8 as position codes.

A sensor 11 for reading the position code attached to the tape 8 is provided in the car 1. The elevator system shown in FIG. 1 does not indirectly detect the position of the car 1 based on a signal from an encoder provided in the hoisting machine 5, etc., but uses a sensor 11 to detect the position code attached to the tape 8. The position of car 1 is detected by direct reading. That is, the elevator system shown in FIG. 1 includes an absolute positioning system. The sensor 11 transmits a signal to the control device 6 according to the read position code.

Table 1 shows an example of the table TA stored in the storage unit 20 (not shown in FIG. 1) of the control device 6. A position code for a specific position within the hoistway 3 is registered in the table TA. As an example, a stop position code is registered in table TA. Car 1 stops at a plurality of stop floors. The stop position code is a code set in advance as a code indicating the position of each stop floor among the position codes attached to the tape 8. In the example shown in table TA, the stop position code indicating the position of the first floor is "5000". The stop position code indicating the position of the top floor is "100000".

The table TA is created by a professional engineer, for example, when the system is installed. The engineer places the car 1 in accordance with the position of each stop floor by performing manual operation, and registers the position code read by the sensor 11 at that time in the table TA. Table TA shows an example in which the sensor 11 reads the position code "5000" when the car 1 is placed in accordance with the position of the first floor in the manual operation. The position code indicating the position of the bottom below the lowest floor may be calculated from the position code indicating the position of the first floor. As another example, the position code indicating the bottom position may be a fixed value.

Table TA shows an example in which the sensor 11 reads the position code "100000" when the car 1 is placed in accordance with the position of the N floor in the manual operation. The position code indicating the position of the top above the top floor may be calculated from the position code indicating the position of the N floor. As another example, the position code indicating the position of the top may be a fixed value. Note that "car 1 is arranged in accordance with the position of the first floor" means that the floor surface of car 1 and the floor surface of the landing on the first floor are arranged at the same height. An engineer may perform manual operation during regularly performed maintenance to update the table TA.

A correction plate 12 is provided in the hoistway 3. The car 1 is provided with a sensor 13 for detecting the correction plate 12. The correction plate 12 is an example of a detected object detected by the sensor 13. The correction plate 12 is arranged in accordance with the position of a specific reference floor. The reference floor is a part of the stop floor where the car 1 stops. For example, the reference floor is one of the stop floors and is set in advance.

FIG. 2 is a diagram for explaining the functions of the correction plate 12 and the sensor 13. A plurality of zones are set on the correction plate 12. A zone is an area that the sensor 13 can distinguish and detect. In the following, a preferred example in which three zones are set in the correction plate 12: a central zone 12a, a lower zone 12b directly below the central zone 12a, and an upper zone 12c directly above the central zone 12a will be described in detail. . Note that the number of zones set on the correction plate 12 may be two. Four or more zones may be set on the correction plate 12.

The correction plate 12 is arranged so that the sensor 13 detects the central zone 12a when the car 1 is arranged in accordance with the position of the reference floor. Preferably, the correction plate 12 is arranged so that the detection position of the sensor 13 coincides with the center of the central zone 12a when the car 1 is arranged in alignment with the position of the reference floor. The lower zone 12b extends downward in a straight line from the lower end of the central zone 12a. The upper zone 12c extends straight upward from the upper end of the central zone 12a.

The method by which the sensor 13 detects the correction plate 12 may be magnetic, optical, or mechanical. The sensor 13 is required to have a function that can distinguish and detect the center zone 12a, lower zone 12b, and upper zone 12c.

In order to realize this function, a plurality of plates for each zone may be provided as the correction plate 12. Identification information that can be detected by the sensor 13 may be provided to each of the plurality of plates. Instead of providing the identification information, the plurality of plates may be arranged vertically or horizontally shifted. As another example, the sensor 13 may include a plurality of detection elements arranged one above the other.

The sensor 13 transmits a signal according to the detected zone to the control device 6.

FIG. 3 is a diagram for explaining the functions of the control device 6. As shown in FIG. 3, in addition to the storage section 20, the control device 6 further includes a reception section 21, a reception section 22, a setting section 23, a calculation section 24, and an operation control section 25. The receiving section 21, the receiving section 22, the setting section 23, and the calculating section 24 may be provided in this system as a device other than the control device 6, for example, as a safety control device.

The receiving unit 21 receives the signal from the sensor 11. The receiving unit 22 receives the signal from the sensor 13.

In the following, an example in which the table TA is stored in the storage unit 20 will be described in detail. That is, as shown in table TA, the first floor, which is the lowest stop floor, is set as the reference floor. The reference position code is a code set in advance as a code indicating the position of the reference floor among the position codes attached to the tape 8. In the example shown below, the reference position code is the position code "5000" indicating the position on the first floor.

The setting unit 23 sets the amount of correction for the reference position code. In the following, the correction amount for the reference position code is also referred to as the reference correction amount. The calculation unit 24 calculates the correction amount for each position code attached to the tape 8 based on the reference correction amount set by the setting unit 23. The operation control unit 25 controls the movement of the car 1 based on the position code read by the sensor 11 and the correction amount calculated by the calculation unit 24. Movement control of the car 1 includes at least speed control or position control of the car 1.

Below, the operation of this system will be described in detail with reference to FIGS. 4 to 7. FIG. 4 is a flowchart showing an example of the operation of the elevator system in the first embodiment.

When a manual operation is performed by an engineer and the table TA is newly created or updated, the reference correction amount is set to 0 (S101).

As described above, the operation control unit 25 controls the movement of the car 1 based on the position code read by the sensor 11 and the correction amount calculated by the calculation unit 24 (S102). The operation control unit 25 calculates the current position of the car 1 using equation (1).
[Current position of car 1] = [APS detection position] + [correction amount] ... (1)
In equation (1), the "APS detection position" is the position indicated by the position code read by the sensor 11. The “correction amount” is the correction amount calculated by the calculation unit 24, and is the correction amount for the position code read by the sensor 11. As an example, the correction amount is calculated from a function f (APS detection position, reference correction amount) between the APS detection position and the reference correction amount.

Note that if the reference correction amount is 0, the correction amount is 0. In such a case, the operation control unit 25 controls the movement of the car 1 by setting the position indicated by the position code read by the sensor 11 as the current position of the car 1. For example, if the car 1 is to be stopped on the second floor, the operation control unit 25 will stop the car 1 at the position where the sensor 11 reads the position code "9000".

While the car 1 is being serviced by the operation control unit 25, the control device 6 determines whether the correction plate 12 is detected by the sensor 13 (S103). While the service is being performed, the operation control unit 25 controls the movement of the car 1 based on the position code read by the sensor 11, and causes the car 1 to respond to registered calls. Basically, when the car 1 stops at a reference floor, the correction plate 12 is detected by the sensor 13. Also, when the car 1 passes through the reference floor, the sensor 13 detects the correction plate 12. As a result, a determination of Yes is made in S103.

If it is determined Yes in S103, it is determined whether the position code read by the sensor 11 is included in a specific code group CG (S104). The code group CG is set in advance. The code group CG includes a plurality of vertically consecutive position codes. Further, the code group CG includes a reference position code. As an example, position codes existing in the range of "position indicated by the reference position code±determination distance" are included in the code group CG. Regarding the determination distance, it is preferable that the following formula is satisfied when the total length of the correction plate 12 is L0.
L0/2≦[judgment distance]≦L0

If the sensor 11 reads a position code that is not included in the code group CG even though the correction plate 12 has been detected by the sensor 13, the determination is No in S104. If the determination in S104 is No, the operation control unit 25 stops the car 1 at the nearest floor or the destination floor, and then stops the service provided by the car 1 (S106). This causes car 1 to stop responding to calls. The operation control unit 25 may cut off the safety circuit and stop the power supply to the hoisting machine 5 in order to stop the service in S106.

If the correction plate 12 is not detected by the sensor 13, the determination in S103 is No. If it is determined No in S103, it is determined whether the position code read by the sensor 11 is included in the code group CG (S105). If the determination in S105 is No, the service by car 1 is continued, and the process returns to S102.

If the position code included in the code group CG is read by the sensor 11 even though the correction plate 12 is not detected by the sensor 13, it is determined as Yes in S105. If the determination is Yes in S105, the operation control unit 25 stops the service by car 1 in S106.

S103 to S105 show processing for determining whether a specific stop condition is satisfied. The stop condition is a condition for stopping a service, and is set in advance. That is, in the example shown in FIG. 4, the stop condition is satisfied when the determination in S104 is No. This shows an example in which the stop condition is satisfied because a signal indicating that the correction plate 12 has been detected is input from the sensor 13 even though the car 1 is located at a position far from the reference floor. Further, in the example shown in FIG. 4, the stop condition is satisfied when the determination in S105 is Yes. This shows an example in which the stop condition is satisfied because a signal indicating that the correction plate 12 has been detected is not input from the sensor 13 even though the car 1 is located sufficiently close to the reference floor.

If the sensor 11 has read the position code included in the code group CG when the correction plate 12 is detected by the sensor 13, a determination of Yes is made in S104. If the determination is Yes in S104, it is determined whether the car 1 has stopped at the reference floor (S107). When the car 1 passes the reference floor, a negative determination is made in S107. If the determination in S107 is No, the process returns to S102.

When the car 1 stops at the reference floor, a determination of Yes is made in S107. For example, if there is no change in the position code read by the sensor 11 for a certain period of time, or even if there is a change, the amount of change is minute, the determination is Yes in S107. If the determination in S107 is Yes, processing for setting the reference correction amount is started. Specifically, the setting unit 23 sets the reference correction amount based on the result of the sensor 13 detecting the correction plate 12 when the car 1 stops at the reference floor under the control of the operation control unit 25.

First, the setting unit 23 identifies the zone detected by the sensor 13 (S108). Next, the setting unit 23 determines whether the specified zone is the central zone 12a (S109).

As mentioned above, if the reference correction amount is 0, the correction amount is 0. In such a case, the operation control unit 25 stops the car 1 at the position where the sensor 11 reads the position code "5000". When the car 1 is stopped at the reference floor, ie, the first floor, under the control of the operation control unit 25, the floor surface of the car 1 and the floor surface of the landing on the first floor are not necessarily arranged at exactly the same height. For example, the tape 8 may stretch due to factors such as temperature changes. In such a case, when the car 1 stops on the first floor under the control of the operation control unit 25, the floor surface of the car 1 is placed at a lower position than the floor surface of the landing on the first floor. FIG. 5 is a diagram showing a state in which the car 1 has stopped at a reference floor. FIG. 5 shows a state in which the car 1 is placed at a position slightly lower than the position of the first floor.

In the example shown in FIG. 5, the setting unit 23 specifies in S108 that the sensor 13 has detected the central zone 12a. As a result, it is determined as Yes in S109. If the determination is Yes in S109, the setting unit 23 does not change the reference correction amount from the current value (S110). That is, if the sensor 13 detects the central zone 12a when the car 1 stops at the reference floor under the control of the operation control unit 25, the setting unit 23 does not change the reference correction amount.

FIG. 6 is a diagram showing another state in which the car 1 has stopped at the reference floor. FIG. 6 shows a state in which the car 1 is placed at a lower position than the state shown in FIG. In the example shown in FIG. 6, the setting unit 23 specifies that the sensor 13 has detected the lower zone 12b in S108. As a result, a negative determination is made in S109. Note that the determination shown in S111 will be described later. When three zones, the center zone 12a, the lower zone 12b, and the upper zone 12c, are set on the correction plate 12, the determination in S111 is always Yes. If the determination in S109 is No, the setting unit 23 resets the reference correction amount (S112).

For example, when determining that the sensor 13 has detected the lower zone 12b in S108, the setting unit 23 changes the reference correction value so that the stopping position of the car 1 on the reference floor is a distance L1 above the current stopping position. do. The distance L1 is a distance according to the distance between the center zone 12a and the lower zone 12b. As an example, the distance L1 is set to the distance between the center of the center zone 12a and the center of the lower zone 12b.

FIG. 7 is a diagram showing another state in which the car 1 has stopped at the reference floor. FIG. 7 shows a state in which the car 1 is placed at a higher position than the first floor due to shrinkage of the tape 8 due to factors such as temperature changes. In the example shown in FIG. 7, the setting unit 23 specifies that the sensor 13 has detected the upper zone 12c in S108. As a result, a negative determination is made in S109. For example, when determining that the sensor 13 has detected the upper zone 12c in S108, the setting unit 23 changes the reference correction value so that the stopping position of the car 1 on the reference floor is a distance L2 below the current stopping position. do. The distance L2 is a distance depending on the distance between the center zone 12a and the upper zone 12c. As an example, the distance L2 is set to the distance between the center of the center zone 12a and the center of the upper zone 12c. The distance L2 may be the same as or different from the distance L1.

When the reference correction amount is reset in S112, the calculation unit 24 calculates the correction amount for each position code attached to the tape 8 based on the reset reference correction amount. Since each stop position code is also one of the position codes attached to the tape 8, the correction amount for each stop position code is also calculated by the calculation unit 24. As an example, the calculation unit 24 calculates each correction amount so that the correction amount for each position code is proportional to the distance from the upper end of the tape 8. Note that the correction amount at the top is 0, and the correction amount for the reference position code is the reference correction amount. Table 2 shows an example in which the car 1 is stopped at the reference floor in the state shown in FIG. 6, and the reference correction amount is set to "-100" in terms of the position code in S112.

As described above, the operation control unit 25 calculates the current position of the car 1 using equation (1). Therefore, when the sensor 11 reads the position code "5000", the operation control unit 25 changes the current position of the car 1 to the position indicated by the position code plus the correction amount "-100", that is, the position code "5000". 4900" is calculated. If the car 1 is to be stopped on the first floor, the motion control unit 25 sets the sensor 11 to the position code so that the position calculated from equation (1) matches the position indicated by the registered position code "5000". Car 1 is stopped near the position where "5100" is read.

In the example shown in this embodiment, the reference correction amount for the reference position code is set by the setting section 23, and the correction amount for each position code attached to the tape 8 is calculated by the calculation section 24. Therefore, in order to correct the position of the car 1, it is not necessary to install the correction plate 12 in accordance with the position of each stop floor. The number of reference floors for installing the correction plate 12 may be one. Therefore, in the example shown in this embodiment, even if the tape 8 expands or contracts, the position of the car 1 can be corrected with a simple configuration. Furthermore, since it is not necessary to install the correction plate 12 in accordance with the position of each stop floor, accidents such as the rope 4 etc. getting caught in the correction plate 12 during an earthquake are unlikely to occur.

Below, other functions that can be adopted by this elevator system will be explained. If possible, the elevator system may employ a combination of the following functions.

In order to ensure that the process for setting the reference correction amount is performed periodically, the operation control unit 25 forces car 1 to the reference floor when a certain period of time has elapsed since the last time car 1 stopped at the reference floor. It may be stopped temporarily. The certain period of time is set in advance.

In this embodiment, an example in which three zones are set on the correction plate 12 has been described. As described above, four or more zones may be set on the correction plate 12. For example, when five zones are set on the correction plate 12, in addition to the center zone 12a, the lower zone 12b, and the upper zone 12c, the lowermost zone immediately below the lower zone 12b and the uppermost zone immediately above the upper zone 12c. is further set on the correction plate 12.

In such a case, if the determination is No in S109 of FIG. 4, it is determined in S111 whether the difference in the detection zone is less than or equal to the allowable value. As an example, if it is specified in S108 that the sensor 13 has detected the lower zone 12b or the upper zone 12c, it is determined as Yes in S111. If it is specified in S108 that the sensor 13 has detected the lowest zone or the highest zone, the determination is No in S111. If the determination is No in S111, the operation control unit 25 stops the service by car 1 in S106.

In this embodiment, an example has been described in which the first floor, which is the lowest floor, is set as the reference floor. The standard floor does not have to be the lowest floor.

As a result of the applicant's investigation, if only one standard floor is set, the standard floor is 11 to 17 from the bottom of the tape 8, where the total length of the tape 8 is 100, among the floors where the car 1 stops. It has been found that it is preferable to set the stop floor within the range of . Furthermore, it has been found that when there is no stop floor in the range, it is preferable to set the reference floor to a stop floor that exists within the range of 0 to 21 from the bottom end of the tape 8. The reason for this will be explained below with reference to FIGS. 8 to 26.

Note that it is preferable that the upper end of the tape 8 be placed slightly above the top floor position, and the lower end placed slightly below the bottom floor position. Compared to the distance from the top floor to the bottom floor, the distance that the tape 8 projects upward from the top floor position and the distance that the tape 8 projects downward from the bottom floor position are extremely small. Therefore, the total length of the tape 8 may be regarded as the distance from the top floor to the bottom floor. In the explanation regarding FIGS. 8 to 26, it is assumed that the total length of the tape 8 and the distance from the top floor to the bottom floor are synonymous.

FIG. 8 is a diagram for explaining heat transfer in the hoistway 3. As shown in FIG. 8, the building 40 is built on land 41. The hoistway 3 is a vertically extending space formed inside the building 40. The hoistway 3 is formed to extend below the ground. The tape 8 is suspended from the top of the hoistway 3.

The building 40 is exposed to the outside air. Therefore, the temperature of the portion of the hoistway 3 formed inside the building 40 is affected by the temperature of the outside air. On the other hand, the lowest part of the hoistway 3 touches the land 41. The heat capacity of the land 41 is extremely large compared to the heat capacity of the building 40. Therefore, the temperature of this part of the hoistway 3 is not affected much by the temperature of the outside air and becomes close to the temperature of the land 41. Therefore, the temperature of the hoistway 3 has a gradient in the height direction depending on the temperature of the outside air. The tape 8 expands and contracts depending on the temperature. For this reason, when detecting the position of the car 1 based on the position code attached to the tape 8, it is preferable that correction is performed in consideration of the expansion and contraction of the tape 8.

FIG. 9 is a diagram for explaining the temperature distribution of the hoistway 3. The vertical axis in FIG. 9 indicates the temperature D of the hoistway 3. The horizontal axis in FIG. 9 indicates the position P in the hoistway 3. Regarding the position P, the lowest floor position is 0 and the highest floor position is 100. Further, regarding the notation of the position P, the normalized numerical value is shown in parentheses. For example, position P[0] is the lowest floor position. Position P[100] is the top floor position. Position P[30] is the position 30th from the bottom floor, where the bottom floor position is 0 and the top floor position is 100. On the horizontal axis of FIG. 9, the position of the top floor is shown on the left, and the position of the bottom floor is shown on the right.

As shown in FIG. 9, the temperature D at the position P[0] is the temperature of the land 41. On the other hand, since the heat capacity of the building 40 is smaller than the heat capacity of the land 41, the temperature D monotonically increases or decreases as it approaches the top floor. For example, when the temperature of the outside air is higher than the temperature of the land 41, the temperature D increases as it approaches the top floor, as shown by the solid arrow in FIG. When the temperature of the outside air is lower than the temperature of the land 41, the temperature D becomes lower as it approaches the top floor, as shown by the two-dot chain arrow in FIG.

FIG. 10 is a diagram for explaining the amount of expansion and contraction of the tape 8. When the temperature D of the hoistway 3 changes linearly with respect to the position P as shown in FIG. 9, the expansion and contraction characteristics of the tape 8 become as shown in FIG. Specifically, the amount of expansion and contraction of the tape 8 is 0 at position P[100]. When the temperature of the outside air is higher than the temperature of the land 41, the amount of expansion and contraction of the tape 8 increases as it approaches the lowest floor, as shown by the curve C1 in FIG. Note that the curve C1 is an upwardly convex curve, and the center of curvature exists below the curve C1. When the temperature of the outside air is lower than the temperature of the land 41, the amount of expansion and contraction of the tape 8 decreases as it approaches the lowest floor, as shown by curve C2 in FIG. The curve C2 is a downwardly convex curve, and the center of curvature exists above the curve C2.

FIG. 11 is a diagram for explaining an example of a correction function. The curve C1 shown in FIG. 11 is the same as the curve C1 shown in FIG. FIG. 11 corresponds to the curve C1 shown in FIG. 10 with a correction function F1 added thereto. FIG. 11 shows an example in which the amount of expansion and contraction of the tape 8 on the lowest floor is detected by a sensor. The sensor is a sensor corresponding to sensor 13. That is, in the example shown in FIG. 11, the amount of expansion and contraction of the tape 8 on the top floor is 0, and the amount of expansion and contraction of the tape 8 on the bottom floor is a value detected by a sensor. The correction function F1 is defined as a linear function by a line segment connecting the amount of expansion and contraction at the top floor and the amount of expansion and contraction at the bottom floor, that is, the value detected by the sensor.

As can be seen from the curve C1, the amount of expansion and contraction of the tape 8 is maximum at the lowest floor. Therefore, in the example shown in FIG. 11, the amount of expansion and contraction of the tape 8 is detected at the position where the amount of expansion and contraction is maximum. FIG. 12 is a diagram showing the difference between the curve C1 shown in FIG. 11 and the straight line showing the correction function F1. In the following, this difference will also be referred to as a correction error. In the example shown in FIG. 12, the correction error is always a positive value. Further, the correction error on the top floor and the correction error on the bottom floor are zero. The curve indicating the correction error is an upwardly convex curve, and the peak of the mountain is the maximum value of the correction error.

Since the correction error is directly linked to the error in the stopping position of the car 1, it is preferable that it be as small as possible. Furthermore, the polarity of the correction error does not need to be constant. An example will be described below in which the maximum value of the correction error is reduced by mixing positive values and negative values in the correction error.

FIG. 13 is a diagram for explaining another example of the correction function. The curve C1 shown in FIG. 13 is the same as the curve C1 shown in FIG. FIG. 13 corresponds to the curve C1 shown in FIG. 10 with a correction function F2 added thereto. FIG. 13 shows an example in which the amount of expansion and contraction of the tape 8 at position P[n] is detected by a sensor. n is greater than 0 and less than 100. For example, n=15. In the example shown in FIG. 13, the amount of expansion and contraction of the tape 8 on the top floor is 0, and the amount of expansion and contraction of the tape 8 at position P[n] is a value detected by a sensor. The correction function F2 is defined as a linear function by a line segment connecting the amount of expansion and contraction at the top floor and the amount of expansion and contraction at position P[n], that is, the value detected by the sensor.

FIG. 14 is a diagram showing the difference between the curve C1 shown in FIG. 13 and the straight line showing the correction function F2. In the example shown in FIG. 14, the correction error of position P[n] is 0. The correction error from position P[0] to position P[n] is a negative value. The correction error from position P[100] to position P[n] is a positive value. In this way, by setting the detection position by the sensor above the lowest floor, the maximum absolute value of the correction error can be reduced. The detection position by the sensor is preferably set so that the absolute value of the maximum value on the positive side of the correction error is equal to the absolute value of the maximum value (minimum value) on the negative side.

Next, the results of an investigation conducted by the applicant based on data acquired from actual elevator equipment will be explained.

FIG. 15 is a diagram showing the temperature distribution of the hoistway 3 measured in an actual elevator system. The horizontal axis in FIG. 15 indicates a value expressed as a ratio of the length of the tape 8 from the top floor to the total length of the tape 8. For example, the value of the ratio at the top floor is 0, and the value of the ratio at the bottom floor is 100. The notation of the horizontal axis in FIG. 15 is substantially the same as the notation of the horizontal axis in FIGS. 9 to 14.

In FIG. 15, the solid line indicates temperature data measured in summer in the hoistway 3 formed in the existing building α. The range in which the car 1 can move in the building α is a little less than 200 m. The dashed-dotted line indicates temperature data measured in summer in the hoistway 3 formed in the existing building β. The range in which the car 1 can move in the building β is a little over 200 m. The two-dot chain line indicates temperature data measured in winter in the hoistway 3 formed in the actual building γ. The range in which a car can move in building γ is a little less than 40 m.

FIG. 16 is a diagram showing the amount of expansion and contraction of the tape 8 calculated from the temperature distribution shown in FIG. 15. FIG. 16 shows the results of calculating the expansion/contraction amount Δl[m] using equation (2).
Δl=l×G×ΔT...(2)
Here, l is the length of the tape 8, G[1/K] is the temperature expansion/contraction coefficient, and ΔT[K] is the temperature difference. In order to obtain the results shown in FIG. 16, the temperature data of the hoistway 3 was actually measured at a plurality of heights, and the temperature at each tape length ratio was determined using linear interpolation. Furthermore, regarding the temperature difference ΔT, the difference from 25 degrees Celsius was calculated.

As shown in FIG. 15, the temperature at the lowest floor of the hoistway 3, that is, the tape length ratio is 100%, is 19 to 26°C, which is approximately room temperature, in all buildings. In buildings α and β, temperature data was acquired during the summer, so the temperature of the hoistway 3 tends to become higher as it approaches the top floor. In the building γ, temperature data was acquired during winter, so the temperature of the hoistway 3 tends to become lower as it approaches the top floor. From FIG. 16, it can be seen that the amount of expansion and contraction of the tape 8 monotonically increases in the summer and monotonically decreases in the winter. Furthermore, since the tape 8 expands and contracts depending on the temperature of the hoistway 3, it is understood that correction is required in accordance with the expansion and contraction.

First, consider the case where the amount of expansion and contraction of the tape 8 on the lowest floor is detected by a sensor. FIG. 17 is a diagram for explaining an example of a correction function. The three curves shown in FIG. 17 are the same as the three curves shown in FIG. 16. FIG. 17 corresponds to the three curves shown in FIG. 16 in which a correction function is added, similar to the example shown in FIG. 11. The correction function Fα is a correction function for a curve indicating the amount of expansion and contraction of the tape 8 provided on the building α. The correction function Fβ is a correction function for a curve indicating the amount of expansion and contraction of the tape 8 provided on the building β. The correction function Fγ is a correction function for a curve indicating the amount of expansion and contraction of the tape 8 provided on the building γ.

FIG. 18 is a diagram showing an example of correction errors. FIG. 18 corresponds to the correction error calculated based on the example shown in FIG. 17 in the same way as the example shown in FIG. That is, the solid curve shown in FIG. 18 represents the difference between the solid curve shown in FIG. 17 and the straight line representing the correction function Fα. The dashed-dotted curve shown in FIG. 18 represents the difference between the dashed-dotted curve shown in FIG. 17 and the straight line representing the correction function Fβ. The two-dot chain curve shown in FIG. 18 represents the difference between the two-dot chain line curve shown in FIG. 17 and the straight line indicating the correction function Fγ.

The solid curve and the dashed-dotted curve shown in FIG. 18 are upwardly convex mountain-shaped curves, and the correction error always takes a positive value. On the other hand, the two-dot chain line curve shown in FIG. 18 is a downwardly convex curve, and the correction error always takes a negative value. Therefore, by setting the detection position by the sensor above the lowest floor, it is possible to mix positive values and negative values in the correction error, thereby reducing the maximum absolute value of the correction error. The appropriate range of detection positions by sensors will be discussed below for each building.

[Building α]
FIG. 19 is a diagram showing the relationship between the position detected by the sensor and the maximum absolute value of the correction error. As shown in FIG. 19, the maximum absolute value of the correction error is the minimum when the detection position by the sensor is 13 from the bottom end of the tape 8, where the total length of the tape 8 is 100. The minimum value is reduced to about 64% compared to the maximum value when the detection position by the sensor is on the lowest floor.

FIG. 20 is a diagram corresponding to FIG. 13. FIG. 21 is a diagram corresponding to FIG. 14. That is, the curve shown in FIG. 20 is the same as the solid curve shown in FIG. 17. FIG. 20 shows an example of a correction function when the position detected by the sensor is at a tape length ratio of 87%. The curve shown in FIG. 21 represents the difference between the curve shown in FIG. 20 and the straight line showing the correction function. As shown in FIG. 21, the polarity of the correction error is reversed at the detection position by the sensor. Furthermore, the absolute value of the maximum value and the absolute value of the minimum value of the correction error are the same value.

[Building β]
FIG. 22 is a diagram showing the relationship between the position detected by the sensor and the maximum absolute value of the correction error. FIG. 22 is a diagram corresponding to FIG. 19. As shown in FIG. 22, the maximum absolute value of the correction error is the minimum when the detection position by the sensor is 15 from the bottom end of the tape 8, where the total length of the tape 8 is 100. The minimum value is reduced to about 66% compared to the maximum value when the detection position by the sensor is on the lowest floor. Regarding the building β, a diagram corresponding to FIG. 20 and a diagram corresponding to FIG. 21 can be similarly obtained.

[Building γ]
FIG. 23 is a diagram showing the relationship between the position detected by the sensor and the maximum absolute value of the correction error. As shown in FIG. 23, the maximum absolute value of the correction error is the minimum when the detection position by the sensor is 17 from the bottom end of the tape 8, where the total length of the tape 8 is 100. The minimum value is reduced to about 68% compared to the maximum value when the detection position by the sensor is on the lowest floor.

FIG. 24 is a diagram corresponding to FIG. 13. FIG. 25 is a diagram corresponding to FIG. 14. That is, the curve shown in FIG. 24 is the same as the two-dot chain curve shown in FIG. FIG. 24 shows an example of a correction function when the detected position by the sensor is at a tape length ratio of 83%. The curve shown in FIG. 25 represents the difference between the curve shown in FIG. 24 and the straight line representing the correction function. As shown in FIG. 25, the polarity of the correction error is reversed at the detection position by the sensor. Further, the absolute value of the maximum value and the absolute value of the minimum value of the correction error are the same value.

FIG. 26 is a diagram showing the ratio of correction errors in each building. On the vertical axis of FIG. 26, the correction error is 100 when the detected position by the sensor is at a tape length ratio of 100%, that is, when the detected position by the sensor is on the lowest floor. The solid polygonal line shown in FIG. 26 is a polygonal line corresponding to the polygonal line shown in FIG. 19. The broken line shown in FIG. 26 is a broken line corresponding to the broken line shown in FIG. 22. The two-dot chain polygonal line shown in FIG. 26 is a polygonal line corresponding to the polygonal line shown in FIG. 23.

As shown in FIG. 26, if the total length of the tape 8 is 100, and the detection position by the sensor is in the range of 0 to 21 from the bottom end of the tape 8, the correction error will be The correction error shall not be greater than the correction error. More preferably, if the position detected by the sensor is within the range of 11 to 17 from the bottom end of the tape 8, the correction error will be smaller than 80% of the correction error when the position detected by the sensor is on the lowest floor. Therefore, it is preferable that the reference floor is a stop floor that exists within the above range. Further, it is preferable that the reference floor is a stop floor existing in the above range, and that the calculation unit 24 calculates the correction amount using linear interpolation.

As another example, a plurality of stopping floors among the stopping floors where the car 1 stops may be set as the reference floor. Preferably, one of the plurality of reference floors is set to the lowest stop floor. It is preferable that the rest of the plurality of reference floors be set at the stop floor closest to each boundary position when the entire length of the tape 8 is equally divided by the number of reference floors. In such a case, the setting unit 23 sets the reference correction amount for the reference position code indicating the position of each of the plurality of reference floors. The calculation unit 24 calculates the correction amount for each position code attached to the tape 8 based on the plurality of reference correction amounts set by the setting unit 23. FIG. 27 is a diagram showing an example of calculating the correction amount when three reference floors are set. When a plurality of reference floors are set, it is preferable that the calculation unit 24 calculates the correction amount by quadratic function approximation. Note that when a plurality of reference floors are set, the correction amount may be calculated using linear interpolation.

As another example, the control device 6 may perform control in consideration of the delay time of the signal from the sensor 11. In such a case, as shown in FIG. 3, the control device 6 further includes an assignment section 26 and a calculation section 27.

As an example, the signal from the sensor 13 is sent to the control device 6 by parallel transmission. On the other hand, the signal from the sensor 11 is sent to the control device 6 by serial transmission. Therefore, a communication delay time Δt occurs in the signal from the sensor 11.

The adding unit 26 adds time information to the signal from the sensor 11. The adding unit 26 adds time information to the signal from the sensor 13. The signal from the sensor 11 and the signal from the sensor 13 to which time information is added by the adding unit 26 are stored in the storage unit 20 for a certain period of time.

FIG. 28 is a diagram for explaining a method of calculating the delay time Δt. FIG. 28 shows an example in which car 1 moving downward stops at a reference floor. The sensor 13 detects the end of the correction plate 12 before the car 1 stops at the reference floor. When the sensor 13 detects the edge of the correction plate 12, a signal from the sensor 13 rises. That is, when the sensor 13 detects the edge of the correction plate 12, the receiving section 22 receives a signal to that effect. In the example shown in FIG. 28, the assigning unit 26 assigns time t1 to the signal from the sensor 13 when the sensor 13 detects the end of the correction plate 12.

After the sensor 13 detects the end of the correction plate 12, the car 1 stops at the reference floor. Signals from the sensor 11 are sent to the control device 6 at regular intervals. Therefore, a signal indicating the position code read by the sensor 11 when the car 1 stops at the reference floor is also sent to the control device 6. In the example shown in FIG. 28, the assigning unit 26 assigns time t3 to the signal from the sensor 11 when the car 1 stops at the reference floor.

The calculation unit 27 calculates the delay time Δt of the signal from the sensor 11 based on the time t1 and time t3 given by the provision unit 26. First, the calculation unit 27 calculates the approach distance L3 of the car 1. The approach distance L3 is the distance that the car 1 has moved since the sensor 13 detected the end of the correction plate 12. If the sensor 13 detects the center zone 12a when the car 1 stops, the calculation unit 27 may calculate the distance from the end of the correction plate 12 to the center of the center zone 12a as the approach distance L3. The calculation unit 27 estimates the position obtained by subtracting the approach distance L3 from the stop position of the car 1 based on the signal from the sensor 11 as the position of the end of the correction plate 12.

As described above, the signal from the sensor 11 is sent to the control device 6 at regular intervals. Therefore, the signal is not necessarily sent from the sensor 11 at the same timing as when the car 1 is placed at the estimated position. Therefore, the calculation unit 27 specifies, among the signals from the sensor 11, a signal including a position code indicating the position closest to the estimated position, and specifies the time information given to the specified signal. In the example shown in FIG. 28, the calculation unit 27 specifies time t2 as the time information based on time t3 and approach distance L3. The calculation unit 27 calculates the delay time Δt from the following equation.
Δt=t2-t1

The operation control unit 25 controls the movement of the car 1 based also on the delay time Δt calculated by the calculation unit 27. For example, movement control of car 1 includes speed control and position control of car 1. For example, the current speed and position of car 1 can be estimated from the following equation.
[Speed V] = [Speed V _APS ] + [Acceleration A _APS ] x [Delay time Δt]
[Position P] = [Position P _APS ] + [Correction amount] + ([Velocity V _APS ] + 1/2 × [Acceleration A _APS ]) × [Delay time Δt]) × [Delay time Δt]
Here, the speed V _APS is the speed calculated based on the signal from the sensor 11. Acceleration A _APS is the acceleration calculated based on the signal from the sensor 11. The position _PAPS is a position based on the signal from the sensor 11.

The operation control unit 25 may simply estimate the current speed and position of the car 1 as shown in the following equation.
[Speed V] = [Speed V _APS ]
[Position P] = [Position P _APS ] + [Correction amount] + [Speed V _APS ] x [Delay time Δt]

In the present embodiment, an example has been described in which all processing is completed in one elevator device included in the elevator system. When the elevator system includes a plurality of elevator devices, necessary information may be exchanged among the plurality of elevator devices.

As an example, the elevator device described above is referred to as elevator device A. In addition to the elevator device A, the elevator system further includes an elevator device B. Elevator device A and elevator device B belong to the same bank and have similar configurations and functions. However, it is desirable that the reference floor in elevator device B is set to a different floor from the reference floor in elevator device A.

In the following, in order to distinguish between elevator device A and elevator device B, the alphabetical letter A is added to the explanation regarding elevator device A, and the alphabetic character B is attached to the explanation about elevator device B. For example, elevator device A includes a control device 6A, and elevator device B includes a control device 6B. For elevator device A, reference floor A is set, and for elevator device B, reference floor B is set. As an example, the reference floor B is set to a different floor from the reference floor A.

In this example, the control device 6A further includes a communication section 28A as shown in FIG. The communication unit 28A has a function of communicating with the control device 6B. Similarly, the control device 6B further includes a communication section 28B. The communication unit 28B has a function of communicating with the control device 6A. The communication unit 28B transmits the reference correction amount B for the reference position code B set by the setting unit 23B to the control device 6A.

The communication unit 28A obtains the reference correction amount B from the elevator device B. The calculation unit 24A calculates the correction amount for each position code attached to the tape 8 based not only on the reference correction amount A set by the setting unit 23A but also on the reference correction amount B acquired by the communication unit 28A. do. The reference position code B is considered to be a code set in advance as a code indicating the position of the reference floor B among the position codes attached to the tape 8A. In this example, the calculation unit 24A can calculate the correction amount in the same way as when a plurality of reference floors A are set.

If the elevator system includes three elevator devices, it is possible to calculate the correction amount as shown in FIG. 27 even if only one reference floor is set for each elevator device.

Additionally, during normal times, all processing may be completed in one elevator device, and necessary information may be acquired from other elevator devices in the event that the sensor 13 fails, etc. For example, if the sensor 13A is functioning normally, the calculation unit 24A calculates the correction amount based on the reference correction amount A set by the setting unit 23A. When the sensor 13A fails, the calculation unit 24A may calculate the correction amount based on the reference correction amount B acquired by the communication unit 28A.

As another example, only some of the elevator devices belonging to the same bank may include the correction plate 12 and the sensor 13. In the elevator apparatus including the correction plate 12 and the sensor 13, a reference correction amount is set for the reference position code based on the result of the sensor 13 detecting the correction plate 12, and the correction amount is calculated. In an elevator device that does not include the correction plate 12 and the sensor 13, the control device 6 acquires information about a reference position code and a reference correction amount for the reference position code from the elevator device that includes the correction plate 12 and the sensor 13. , calculates the correction amount.

FIG. 29 is a diagram showing an example of hardware resources of the control device 6. The control device 6 includes a processing circuit 30 including a processor 31 and a memory 32 as hardware resources. The processing circuit 30 may include a plurality of processors 31. The processing circuit 30 may include multiple memories 32.

In this embodiment, each section indicated by reference numerals 20 to 28 indicates a function that the control device 6 has. The functions of the storage unit 20 are realized by the memory 32. The functions of each part shown by reference numerals 21 to 28 can be realized by software written as a program, firmware, or a combination of software and firmware. The program is stored in the memory 32. The control device 6 realizes the functions of each section indicated by reference numerals 21 to 28 by having the processor 31 (computer) execute a program stored in the memory 32.

The processor 31 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. As the memory 32, a semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD may be used. Semiconductor memories that can be employed include RAM, ROM, flash memory, EPROM, EEPROM, and the like.

FIG. 30 is a diagram showing another example of the hardware resources of the control device 6. In the example shown in FIG. 30, the control device 6 includes a processing circuit 30 including a processor 31, a memory 32, and dedicated hardware 33. FIG. 30 shows an example in which some of the functions of the control device 6 are realized by dedicated hardware 33. All the functions of the control device 6 may be realized by the dedicated hardware 33. The dedicated hardware 33 can be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

The elevator system according to the present disclosure can be applied to an elevator system equipped with an absolute positioning system.

1. Car, 2. Counterweight, 3. Hoistway, 4. Rope, 5. Hoisting machine, 6. Control device, 7. Machine room, 8. Tape, 9. Support member, 10. Support device, 11. Sensor, 12. Correction Plate, 12a Central zone, 12b Lower zone, 12c Upper zone, 13 Sensor, 20 Storage unit, 21 Receiving unit, 22 Receiving unit, 23 Setting unit, 24 Calculating unit, 25 Operation control unit, 26 Giving unit, 27 Calculating unit, 28 Communication department, 30 processing circuit , 31 Processor, 32 Memory, 33 Dedicated hardware, 40 Building, 41 Land

Claims

An elevator system in which a car moves along a hoistway, the car stops at a plurality of stop floors, and some of the plurality of stop floors are set as reference floors,
a tape provided in the hoistway and having a position code attached thereto over a specific range in which the car can move;
a first sensor provided on the car and reading a position code attached to the tape;
a detected object provided in the hoistway in accordance with the position of the reference floor;
a second sensor provided in the cage and for detecting the detected object;
an operation control unit that controls movement of the car;
a setting unit that sets a reference correction amount for the reference position code based on a result of the detection of the detected object by the second sensor when the car stops at the reference floor under the control of the operation control unit;
a first calculation unit that calculates a correction amount for each position code attached to the tape based on the reference correction amount set by the setting unit;
Equipped with
The operation control unit controls movement of the car based on the position code read by the first sensor and the correction amount calculated by the first calculation unit,
The reference position code is a code set in advance as a code indicating the position of the reference floor among the position codes attached to the tape.
A first zone, a second zone immediately below the first zone, and a third zone immediately above the first zone are set in the detected object,
The setting unit is configured to set, when the car stops at the reference floor,
When the second sensor detects the first zone, the reference correction amount is not changed;
When the second sensor detects the second zone, setting the reference correction amount so that the stopping position of the car on the reference floor is a first distance above the current stopping position;
When the second sensor detects the third zone, setting the reference correction amount so that the stopping position of the car on the reference floor is a second distance below the current stopping position;
The first distance is a distance depending on the distance between the first zone and the second zone,
The elevator system according to claim 1, wherein the second distance is a distance depending on a distance between the first zone and the third zone.
A code group including multiple vertically consecutive position codes is set in advance,
the code group includes the reference position code;
The operation control unit stops the service provided by the car when a specific stop condition is met;
The stopping conditions are:
Established when a position code not included in the code group is read by the first sensor even though the detected object is detected by the second sensor,
The elevator according to claim 1 or 2, which is established when a position code included in the code group is read by the first sensor even though the detected object is not detected by the second sensor. system.
The elevator system according to any one of claims 1 to 3, wherein the operation control unit causes the car to stop at the reference floor when a certain period of time has passed since the car last stopped at the reference floor. .
an adding unit that adds time information to the signal from the first sensor and the signal from the second sensor;
Time information given to a signal from the second sensor when the second sensor detects the end of the detected object and a signal from the first sensor when the car stops at the reference floor. a second calculation unit that calculates the delay time of the signal from the first sensor based on the time information provided to the second sensor;
further comprising;
The elevator system according to any one of claims 1 to 4, wherein the operation control unit controls movement of the car based also on the delay time calculated by the second calculation unit.
The reference floor is a stop floor that exists within a range of 11 to 17 from the bottom end of the tape when the total length of the tape is 100 among the plurality of stop floors,
The elevator system according to any one of claims 1 to 5, wherein the first calculation unit calculates the correction amount using linear interpolation.
A plurality of the standard floors are set,
The plurality of reference floors are the lowest stop floor and the stop floor closest to each boundary position when the entire length of the tape is equally divided by the number of reference floors,
The setting unit sets a reference correction amount for a reference position code indicating the position of each of the plurality of reference floors,
The elevator system according to any one of claims 1 to 5, wherein the first calculation unit calculates the correction amount based on the plurality of reference correction amounts set by the setting unit.
Further comprising a communication unit for acquiring a second reference correction amount for the second reference position code from another elevator device of the same bank,
The second reference position code is a code set in advance as a code indicating the position of the second reference floor among the position codes attached to the tape,
Any one of claims 1 to 7, wherein the first calculation unit calculates the correction amount based on the reference correction amount set by the setting unit and the second reference correction amount acquired by the communication unit. The elevator system described in item (1) above.